**Warmup**

**Activity #1**

**Calculate Percentage Loss when the Cost Price & Selling Price are Given**.

The Selling Price is labelled in red while the Cost price is labelled in blue.

- To find the percentage loss when the SP is $520 and the CP is $800, pull to the right. The value that is obtained as the loss is the first step in the calculation.
- Now, check the “Calculation” box to see the next step to follow.
- Find the value of d before checking the box to confirm.
- Click to reset.
- To continue practicing, drag the red part. If you make it longer than the blue part, you can calculate percentage gain(profit). The application will be the same.
- You can also change the cost price from 800, by entering a different amount.

**Activity #2**

**Calculate the Selling Price when the Cost price and Percentage Loss are given. **

- To find the SP when the CP is $800 and the percentage loss is 35, again pull to the right (Loss) to see what part of the Tape diagram you are looking for.
- Check the “Calculation” box to see the next step to follow.
- Attempt finding the answer before checking the box to confirm.
- Click to reset.
- To continue practicing, drag the red part. If you make it longer than the blue part, you can calculate Profit. The application will be the same.

**Activity #3**

**Calculate the Cost Price when the Selling Price and Percentage Loss are given. **

- Check the “Cost” box.
- To find the SP when the CP is $520 and the percentage loss is 35, pull to the right (Loss) to see on the Tape diagram the amount representing 35%. Note how it is calculated.
- Check the “Calculation” box to see the next step to follow.
- Attempt the question before checking the box to confirm your answer.
- Click to reset.
- To continue practicing, drag the red part. If you make it longer than the blue part, you can calculate percentage gain(profit). The application will be the same.

**Quiz Time**

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